A double interleaved buck topology hydrogen production power supply and its control method
A technology of power supply and topology, applied in the direction of control/regulation system, conversion equipment without intermediate conversion to AC, electrolytic components, etc., can solve the problems of power grid pollution, inability to connect to the DC power grid system, large harmonics, etc., and achieve low current ripple effect
Active Publication Date: 2022-06-28
HEBEI JIANTOU NEW ENERGY CO LTD +1
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Problems solved by technology
The traditional hydrogen production power supply is mostly a rectifier composed of a transformer and a thyristor. This power supply device will generate a large number of harmonics, pollute the power grid, and cannot be connected to the DC power grid system
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[0017] The patent of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments. The patent of the present invention provides a high-power hydrogen production power supply device. The hydrogen production power supply is based on two sets of staggered BUCK series topology. Current bus capacitor 4, second DC bus capacitor 14, first interleaved BUCK circuit 5, second interleaved BUCK circuit 15, first filter circuit 6 and second filter circuit 16, first voltage sampling unit 8, second voltage sampling unit 18. Consists of a first current sampling unit 7 , a second current sampling unit 17 and a third current sampling unit 27 .
[0018] figure 1 Represents the schematic diagram of the main circuit of the hydrogen production power supply based on the double interleaved buck topology. The hydrogen production power supply pre-charging circuits 1 and 11 are composed of DC contactors and pre-charging resistors, and a pre-cha...
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The patent of the present invention discloses a hydrogen production power supply based on a double interleaved BUCK series topology and its control method. The hydrogen production power supply disclosed in this patent includes a pre-charging circuit, a DC circuit breaker, a DC bus capacitor, a fuse, and two sets of interleaved BUCK circuits. , 2 sets of filter circuits, 3 current sampling units, 2 voltage sampling units. In the invention patent, two sets of interleaved BUCK circuits are connected in series, the midpoint of the BUCK circuit is connected to the midpoint of the bus capacitor and the midpoint of the hydrogen production electrolyzer and grounded, and the output of the capacitor is filtered by an LC filter circuit. The topology of double BUCKs in series can increase the input voltage level of the power supply, and each set of BUCK circuits adopts an interleaved parallel structure to achieve power transmission at a higher power level. The control method of the hydrogen production power source described in this patent mainly realizes the control of the output current by adjusting the duty cycle of the switching tube of the BUCK circuit, and at the same time controls the voltage of the bus capacitor. The hydrogen production power source mentioned in the patent of this invention is suitable for large-scale photovoltaic or wind power electrolysis water hydrogen production system.
Description
technical field [0001] The patent of the present invention relates to a power supply device for producing hydrogen by electrolysis of water in the field of hydrogen energy and a control method thereof, especially a power source for electrolysis of water in the field of hydrogen production from renewable energy sources such as wind power and photovoltaics. Background technique [0002] The renewable energy power generation industry is developing rapidly, and the proportion of power generation in the country is increasing year by year. The problem of renewable energy consumption is prominent. Hydrogen production by electrolysis of water is one of the ways to consume renewable energy. Traditional hydrogen production power sources are mostly rectifiers composed of transformers and thyristors. Such power supply devices will generate a large number of harmonics, cause pollution to the power grid, and cannot be connected to the DC power grid system. [0003] In order to realize dir...
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IPC IPC(8): H02M3/158H02M3/04H02M1/14C25B9/65C25B1/04
CPCH02M3/1584H02M3/04H02M1/14C25B1/04Y02P20/133
Inventor 谭建鑫井延伟白日欣张雷李海东
Owner HEBEI JIANTOU NEW ENERGY CO LTD